Simplify i^31 (click photo for options)

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?